Side airbag device

Abstract

A side airbag device includes a side airbag configured to protect a side of an occupant by being developed and expanded when a vehicle is impacted from the side direction. The side airbag is formed with a shoulder portion compartment corresponding to a shoulder portion of the occupant, a waist portion compartment, and a chest portion compartment. The shoulder portion compartment includes a first wrap section that overlaps, when viewed in a side direction of the vehicle, a B pillar, a second wrap section that overlaps, when viewed in the side direction of the vehicle, a door main body section, and an intermediate section that is formed between the first wrap section and the second wrap section and travels from the first wrap section toward the second wrap section along a door belt line.

1 . A side airbag device, comprising:
 a side airbag configured to protect a side of an occupant in a vehicle by being developed and expanded when the vehicle is impacted from the side direction, wherein   the side airbag is formed with a plurality of compartments including a shoulder portion compartment corresponding to a shoulder portion of the occupant,   the shoulder portion compartment is positioned on an upper side of the vehicle in the side airbag when the side airbag is developed and expanded, and includes   a first wrap section that overlaps, when viewed in a side direction of the vehicle, a pillar to which a door of the vehicle is adjacent in a front/back direction of the vehicle,   a second wrap section that overlaps, when viewed in the side direction of the vehicle, a door main body section, in which a door window in the door is accommodated, and   an intermediate section that is formed between the first wrap section and the second wrap section and travels from the first wrap section toward the second wrap section along a door belt line which is an end of the door main body section on an upper side of the vehicle, and   the first wrap section and the second wrap section are formed on both sides of the shoulder portion compartment.   
     
     
         2 . The side airbag device according to  claim 1 , wherein when the side airbag is developed and expanded, pressure of the shoulder portion compartment becomes the highest pressure. 
     
     
         3 . The side airbag device according to  claim 2 , wherein the plurality of the compartments include
 the shoulder portion compartment,   a waist portion compartment corresponding to a waist portion of the occupant, and   a chest portion compartment that is formed between the shoulder portion compartment and the waist portion compartment and corresponds to a chest portion of the occupant, wherein   when the side airbag is developed and expanded, pressure of the chest portion compartment becomes pressure lower than those of the shoulder portion compartment and the waist portion compartment.   
     
     
         4 . The side airbag device according to  claim 3 , wherein when the side airbag is developed and expanded, the chest portion compartment is formed with a recessed section for arm which is more recessed to outer side of the vehicle than a periphery and corresponds to an arm of the occupant. 
     
     
         5 . The side airbag device according to  claim 2 , further comprising:
 an inflator configured to generate gas for developing and expanding the side airbag, wherein   the side airbag is formed with an inner tube for supplying the gas from the inflator to the plurality of the compartments, and   the pressures of the plurality of the compartments when the side airbag is developed and expanded are changed based on a flow path resistance when the gas is supplied to the plurality of compartments in the inner tube.   
     
     
         6 . The side airbag device according to  claim 5 , wherein a suppression mechanism that suppresses the gas from flowing from the plurality of the compartments into the inner tube is provided between the inner tube and the plurality of the compartments. 
     
     
         7 . The side airbag device according to  claim 2 , wherein the shoulder portion compartment has the highest gas tightness. 
     
     
         8 . A side airbag device, comprising:
 a side airbag configured to protect a side of an occupant in a vehicle by being developed and expanded when the vehicle is impacted from the side direction, wherein   the side airbag includes   a first wrap section that overlaps, when viewed in a side direction of the vehicle, a pillar to which a door of the vehicle is adjacent in a front/back direction of the vehicle, and   a second wrap section that overlaps, when viewed in the side direction of the vehicle, a lower section of the vehicle than a door window provided with the door,   the first wrap section and the second wrap section are formed on both sides of the shoulder portion compartment, and   a section of a contour line formed between the first wrap section and the second wrap section of the side airbag when viewed in the side direction of the vehicle is positioned on a lower side of the vehicle than a position on the uppermost side of the contour line in the vehicle in the first wrap section as well as positioned on an upper side of the vehicle than a position on the uppermost side of the contour line in the vehicle in the second wrap section when the side airbag is developed and expanded.   
     
     
         9 . The side airbag device according to  claim 3 , further comprising:
 an inflator configured to generate gas for developing and expanding the side airbag, wherein   the side airbag is formed with an inner tube for supplying the gas from the inflator to the plurality of the compartments, and   the pressures of the plurality of the compartments when the side airbag is developed and expanded are changed based on a flow path resistance when the gas is supplied to the plurality of compartments in the inner tube.   
     
     
         10 . The side airbag device according to  claim 4 , further comprising:
 an inflator configured to generate gas for developing and expanding the side airbag, wherein   the side airbag is formed with an inner tube for supplying the gas from the inflator to the plurality of the compartments, and   the pressures of the plurality of the compartments when the side airbag is developed and expanded are changed based on a flow path resistance when the gas is supplied to the plurality of compartments in the inner tube.